#define MT_QUIRK_ALWAYS_VALID (1 << 4)
#define MT_QUIRK_VALID_IS_INRANGE (1 << 5)
#define MT_QUIRK_VALID_IS_CONFIDENCE (1 << 6)
+#define MT_QUIRK_CONFIDENCE (1 << 7)
#define MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE (1 << 8)
#define MT_QUIRK_NO_AREA (1 << 9)
#define MT_QUIRK_IGNORE_DUPLICATES (1 << 10)
__s32 contactid; /* the device ContactID assigned to this slot */
bool touch_state; /* is the touch valid? */
bool inrange_state; /* is the finger in proximity of the sensor? */
+ bool confidence_state; /* is the touch made by a finger? */
};
struct mt_class {
.attrs = sysfs_attrs
};
+static void mt_get_feature(struct hid_device *hdev, struct hid_report *report)
+{
+ struct mt_device *td = hid_get_drvdata(hdev);
+ int ret, size = hid_report_len(report);
+ u8 *buf;
+
+ /*
+ * Only fetch the feature report if initial reports are not already
+ * been retrieved. Currently this is only done for Windows 8 touch
+ * devices.
+ */
+ if (!(hdev->quirks & HID_QUIRK_NO_INIT_REPORTS))
+ return;
+ if (td->mtclass.name != MT_CLS_WIN_8)
+ return;
+
+ buf = hid_alloc_report_buf(report, GFP_KERNEL);
+ if (!buf)
+ return;
+
+ ret = hid_hw_raw_request(hdev, report->id, buf, size,
+ HID_FEATURE_REPORT, HID_REQ_GET_REPORT);
+ if (ret < 0) {
+ dev_warn(&hdev->dev, "failed to fetch feature %d\n",
+ report->id);
+ } else {
+ ret = hid_report_raw_event(hdev, HID_FEATURE_REPORT, buf,
+ size, 0);
+ if (ret)
+ dev_warn(&hdev->dev, "failed to report feature\n");
+ }
+
+ kfree(buf);
+}
+
static void mt_feature_mapping(struct hid_device *hdev,
struct hid_field *field, struct hid_usage *usage)
{
break;
}
- td->inputmode = field->report->id;
- td->inputmode_index = usage->usage_index;
+ if (td->inputmode < 0) {
+ td->inputmode = field->report->id;
+ td->inputmode_index = usage->usage_index;
+ } else {
+ /*
+ * Some elan panels wrongly declare 2 input mode
+ * features, and silently ignore when we set the
+ * value in the second field. Skip the second feature
+ * and hope for the best.
+ */
+ dev_info(&hdev->dev,
+ "Ignoring the extra HID_DG_INPUTMODE\n");
+ }
break;
case HID_DG_CONTACTMAX:
+ mt_get_feature(hdev, field->report);
+
td->maxcontact_report_id = field->report->id;
td->maxcontacts = field->value[0];
if (!td->maxcontacts &&
break;
}
+ mt_get_feature(hdev, field->report);
if (field->value[usage->usage_index] == MT_BUTTONTYPE_CLICKPAD)
td->is_buttonpad = true;
break;
+ case 0xff0000c5:
+ /* Retrieve the Win8 blob once to enable some devices */
+ if (usage->usage_index == 0)
+ mt_get_feature(hdev, field->report);
+ break;
}
}
mt_store_field(usage, td, hi);
return 1;
case HID_DG_CONFIDENCE:
+ if (cls->name == MT_CLS_WIN_8 &&
+ field->application == HID_DG_TOUCHPAD)
+ cls->quirks |= MT_QUIRK_CONFIDENCE;
mt_store_field(usage, td, hi);
return 1;
case HID_DG_TIPSWITCH:
return;
if (td->curvalid || (td->mtclass.quirks & MT_QUIRK_ALWAYS_VALID)) {
+ int active;
int slotnum = mt_compute_slot(td, input);
struct mt_slot *s = &td->curdata;
struct input_mt *mt = input->mt;
return;
}
+ if (!(td->mtclass.quirks & MT_QUIRK_CONFIDENCE))
+ s->confidence_state = 1;
+ active = (s->touch_state || s->inrange_state) &&
+ s->confidence_state;
+
input_mt_slot(input, slotnum);
- input_mt_report_slot_state(input, MT_TOOL_FINGER,
- s->touch_state || s->inrange_state);
- if (s->touch_state || s->inrange_state) {
+ input_mt_report_slot_state(input, MT_TOOL_FINGER, active);
+ if (active) {
/* this finger is in proximity of the sensor */
int wide = (s->w > s->h);
/* divided by two to match visual scale of touch */
td->curdata.touch_state = value;
break;
case HID_DG_CONFIDENCE:
+ if (quirks & MT_QUIRK_CONFIDENCE)
+ td->curdata.confidence_state = value;
if (quirks & MT_QUIRK_VALID_IS_CONFIDENCE)
td->curvalid = value;
break;
case HID_DG_TOUCHSCREEN:
/* we do not set suffix = "Touchscreen" */
break;
+ case HID_DG_TOUCHPAD:
+ suffix = "Touchpad";
+ break;
case HID_GD_SYSTEM_CONTROL:
suffix = "System Control";
break;
* reports. Fortunately, the Win8 spec says that all touches
* should be sent during each report, making the initialization
* of input reports unnecessary.
+ *
+ * In addition some touchpads do not behave well if we read
+ * all feature reports from them. Instead we prevent
+ * initial report fetching and then selectively fetch each
+ * report we are interested in.
*/
- hdev->quirks |= HID_QUIRK_NO_INIT_INPUT_REPORTS;
+ hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
td = devm_kzalloc(&hdev->dev, sizeof(struct mt_device), GFP_KERNEL);
if (!td) {